Fuck butter is the creamy substance found concentrated at the base of the penis, dripping down the scrotum, on the lips of the vagina and always all over the sheets. Primarily, this is "churned" pussy juice that has been scraped from the cock each time it is plunged into the depths.
Fuck butter can sometimes be pink or streaked with pink if the vagina was injured during sex or if the female is ragging.
Also, fuck butter can be green. This is a sign of one fuct up piece of meat, either on the male or female side of the equation. Seek medical attention ASAP!
My wife LOVES to use her tongue to clean fuck butter my bawl sac.
A random outburst which can come at the end of any sentance following either a very manly sentance (said very enthusiastically) or following the receiving of bad news (said very angrily)
Charlie: GET ON THAT SORT OVER THERE!
Karim: WHERE?!
Lewis: *Raises pint glass* FUCK BUTTER!
When you are so excited to eat your Reese's that you forget to take off the SECOND rapper that is inconveniently the exact same color as the chocolate.